For those interested in using "helmet cams" for sports, etc., I’ll post a link to some of my work with them. These are shot with a Viosport Adventure CamIII which has interchangable lens and filters. The camera is 500 line resolution and recorded into a DV camcorder. This one link is jets that I shot just north of Phoenix. When you go to this link, select the clip "High Flying". http://www.viotac.com/gallery/index.php?action_handler_x=on#
I’ll have some others up shortly- including extreme downhill mountain biking. These cameras are way too much fun to use!